# Smoothed Moving Average Envelope (SMMAENVELOPE)

> QuantNexus indicator page for SMMA envelope bands.

**Route**: `/quantnexus/indicators/smmaenvelope/`

## What It Does

SMMAENVELOPE builds percentage bands around a smoothed moving average.

## Formula

`Upper = SMMA * (1 + perc / 100)`  
`Lower = SMMA * (1 - perc / 100)`

## Parameters

- `period` - default `30`
- `perc` - default `2.5`

## C++23 API

```cpp
#include <nonabt/indicators/smmaenvelope.hpp>
auto smmaEnv = std::make_unique<nonabt::SMMAENVELOPE>(data().close(), 30, 2.5);
```

## Common Usage

- Use it to frame trend with a slower smoothing baseline.
- Pair it with price action around the outer bands.
- Useful for trend continuation and pullback setups.